TB 9-4931-290-24
(9) Repeat technique of (1) through (8) above as necessary for best overall indications.
(10) Set RANGE switch to 100 V and OUTPUT VOLTAGE controls to TEN0.00.
(11) Disconnect resistant decade from TI.
(12) Measure and record TI output.
(13) Adjust resistance decade to 20 kilohms and reconnect to TI output.
S/N below 900] to obtain multimeter indication of value recorded in (12) above, minus 4.762 V
(R).
(15) Adjust resistance decade to 1 megohm.
(16) Set RANGE switch to 10 V and OUTPUT VOLTAGE controls to TEN.000.
(17) Adjust R51 10 V DC (fig. 1 or 2) for a 10.0 V indication on multimeter (R).
(18) Set RANGE switch to 1 V and OUTPUT VOLTAGE controls to .TEN000.
(19) Adjust R52 1 V DC (fig. 1 or 2) for a 1.0 V indication on multimeter (R).
(20) Set RANGE switch to 100 mV and OUTPUT VOLTAGE controls to TEN0.00.
(21) Adjust R53 100 mV DC (fig. 1 or 2) for a l00 mV (millivolt) indication on
multimeter (R).
(22) Set RANGE switch to 10 mV and OUTPUT VOLTAGE controls to TEN.000.
(23) Adjust R54 10 mV DC (fig. 1 or 2) for a 10.0 mV indication on multimeter (R).
(24) Set RANGE switch to 1 mV and OUTPUT VOLTAGE controls to .TEN000.
(25) Adjust R55 1 mV DC (fig. 1 or 2) for a 1.0 mV indication on multimeter (R).
11. Distortion and Frequency
a. Performance Check
(1) Connect audio analyzer to TI OUTPUT terminals.
(2) Position controls as listed in (a) through (c) below:
(a) MODE switch to 1 kc RMS.
(b) RANGE switch to 10 V.
(c) OUTPUT VOLTAGE controls to TEN.000.
(3) Measure distortion. Distortion will be less than 0.2 percent.
(4) Set MODE switch to 0.4 kc RMS.
(5) Measure distortion. Distortion will be less than 0.2 percent.
(6) Measure frequency. Frequency will be between 388 and 412 Hz.
(7) Set MODE switch to 1 kc RMS. Measure frequency. Frequency will be between
970 and 1030 Hz.
b. Adjustments. No adjustments can be made.
12. Final Procedure
a. Deenergize and disconnect all equipment.
b. Annotate and affix DA label/form in accordance with TB 750-25.